/**
 * Copyright 2009 Friedrich Schäuffelhut
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. 
 */
package de.schaeuffelhut.jdbc;

import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * A JdbcUtil {@link IfcResultType} which delegates the data retrieval to an
 * other {@link IfcResultType} and then converts to the actual type.
 * 
 * @author Friedrich Schäuffelhut
 * 
 * @param <Tout>
 * @param <Tin>
 */
public abstract class ConvertingResultType<Tout,Tin> implements IfcResultType<Tout>
{
	private static final long	serialVersionUID	= -4995146891207196356L;

	final IfcResultType<Tin> delegate;
	
	public ConvertingResultType(IfcResultType<Tin> delegate)
	{
		this.delegate = delegate;
	}

	public Tout getResult(ResultSet resultSet, int index) throws SQLException
	{
		return convert( delegate.getResult( resultSet, index ) );
	}
	
	protected abstract Tout convert(Tin value);
	
	public abstract Class<Tout> getResultType();
}